We stayed at Kidani when my kids were 3 and 1-almost-2 and it was phenomenal. My older son played on the splash pad for hours, my younger son loved the pool and some of the lower impact splash pad areas.
The biggest difference between DLR and WDW with small kids is the transportation. It’s awful by comparison to DLR’s lovely ability to just walk to the parks, and it often has long waits, which i have found intolerable with impatient kids. I strongly recommend renting a car and taking it to AK, Epcot, and DHS, and only using the Disney buses to MK. It’s also a million times easier to get a sleeping kid transferred in and out of a car than a bus, and a lot easier to manage the stroller in a car.
Renting a car would be my recommendation at any resort, and as long as you have one, Kidani becomes an incredible option, with the parking garage under the building, so you can park close to whichever elevator takes you closest to your room.
Next best option IMO is Poly. The pools at GF and BLT are disappointing compared to Poly and AKL, so Poly is the best Monorail option for small children to me.
SSR is also a strong option if you’re renting a car, it has 3 different splash pads so you can find your favorite one.